sheeman



(No Model.)

W. J. SHERMAN.

EARTH AUGBR.

No. 250,293. Patented Nov. 29,1881.

WITN ESSES I INVENTOR #4 w v %W @43 UNITED STATES PATENT O FICE.

WILLIAM J. SHERMAN, OF ST. AUGUSTINE, FLORIDA.

EARTH-AUGER.

SPECIFICATION forming part of Letters Patent No. 250,293, dated November 29, 1881.

- Application filed July 16, 1881. (No model.)

To all whom it may concern Be it known that I, WM. J. SHERMAN, a citizen of the United States, resident of St. Augustine, ill the county of St. Johns and State of Florida, have invented a new and Valuable Improvement in Well-Boring Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation ofvertical longitudinal section of my invention. Fig. 2 is a side view of the head-block. Fig. 3 is a cross-section 011 linear m, Fig. 1; and Fig. 4 is a cross-section of one of the angers.

This invention relates to improvements in devices for boring wells; and it consists in the construction and novel arrangement of parts, as hereinafter set forth.

In the annexed drawings, the letter a designates a block orhead-piece having the tang a for attachment to the operating mechanism, and a flattened socket, a through which are made transversely the registering-slots I). Keyed to this headpiece in said socket are the augershanks 0. These have at their upper ends the reduced ends or tangs, d, curved on the outside to fit the socket and flattened on their inner faces, 0, in which faces are formed the angular grooves f. These shanks are held in the socket by a gib, g, and cotter h passing through the slots 1) and the meeting notches or grooves f. The au ger-shanks c are made inwardly concave in cross-section, and along the crowns of the curves run ribs 70, which strengthen the shanks. At their lower ends these shanks have the reversely-projecting cutting-lips l.

Secured within one of the shanks, at its upper end, is a spring, m, the free end of which bears against the other shank. This spring tends to keep the shanks apart while working, sufficient room being provided in the socket a to allow the necessary play.

The anger, as thus constructed and arranged, is secured by its tang a. to any suitable handle or to some operating mechanism. Power is applied so as to give a rotary movement to the auger when the cutting-lips I operate to bore a hole ill the earth.

HEtVlllg' described myinvention, what I claim, and desire to secure by Letters Patent, is-

The combination of head-piece to, having socket a shanks 0, having notched tangs d, ribs 7c, and cutting-lips l, gib g, cotter h, and spring m, as set forth.

In testimony that I claim theabove I have hereunto subscribed my name in the presence of two witnesses.

WVILLIAM JOHN SHERMAN.

Witnesses:

BARTATO F. .OLIVIERO, J OI-IN T. CARE. 

